KR101796459B1 - Ceramic coating method and its coated kitchenware having intaglio and relief pattern - Google Patents

Abstract

The present invention relates to a ceramic coating method for clearly displaying embossed and engraved patterns on the surface of a kitchen utensil and a kitchen utensil coated by the same. The present invention is to provide a ceramic coating method and a kitchen utensil coated by the same wherein a lower coating layer and an upper coating layer are formed, by using a ceramic coating agent, on the kitchen utensil having patterns of an engrave unit and an embossed unit on a surface thereof and colors of the engraved unit and the embossed unit are expressed to be different. The ceramic coating method comprises: a pretreatment step of pre-treating the surface of a kitchen utensil having patterns comprising an engraved unit and an embossed unit; a preheating step of removing impurities and performing pre-heating after pretreatment step; a lower coating step of forming a lower coating layer by applying a ceramic coating agent having colors to the embossed unit and the engraved unit of the surface of the kitchen utensil after preheating step; a preliminary drying step of preliminarily drying a lower coating layer for adjustment to make a surface roughness of 0.2-5 m and a water contact angle of 80 or smaller after the lower coating step; a coating layer removal step of removing the lower coating layer coated on the embossed unit of the surface of the kitchen utensil; an upper coating step of forming an upper coating film by applying a non-adhesive transparent ceramic coating agent to the embossed unit from which the lower coating has been removed and a remaining lower coating layer; and a drying step of completely drying the upper coating layer after the upper coating step. Accordingly, the kitchen utensil with the engraved unit and the embossed unit of the patterns which have different colors can be manufactured.

Description

[0001] The present invention relates to a ceramic coating method and a ceramic coating method for coating a surface of a kitchen ware,

[0001] The present invention relates to a ceramic coating method for expressing the shape of a mandibular oblong pattern on a surface of a kitchen ware, and a kitchen ware manufactured thereby, and a ceramic coating agent is coated on the surface of a kitchenware having a relief portion and a relief portion, A ceramic coating method of a unique design in which the color of the embossed portion and the embossed portion are different while the non-adhesive property is applied and the coated ceramic coating method is applied to the entire surface of the coated ceramic coating, It is about the thing.

With the development of the industry and modernization of the civilization, the demand of the consumers who demand unique design and high functionality of the kitchen ware market has been increased and the kitchen ware market has been changed and developed to meet this demand.

Most of the kitchenware market, frying pan, and pot materials are made of aluminum and stainless steel (SUS), and other materials such as glass or iron are used. In recent years, A method of improving the quality of the product by machining the surface and realizing a unique material surface is emerging.

Since aluminum has a low metal strength, an aluminum frying pan or a wok can be formed by die casting or a press method, and various shapes including a yang angle can be realized. have.

However, SUS has a higher strength than aluminum and can not be diecasted, making it difficult to achieve various surface effects. It is also possible to apply an embossing effect using a press, but this is also possible only when the SUS material is very thin Respectively.

Since the kitchenware is exposed to high temperature for a long time, the kitchenware made of SUS material has a thickness exceeding a certain thickness in order to withstand the thermal deformation. In order to survive, those with double layer structure such as 2-PLY and 3-PLY are being used.

Conventionally, in order to realize a high functionality and a unique material surface on a kitchen ware made of SUS and aluminum, a pattern having a depressed portion and a relief portion is formed on the surface of the kitchen ware, A fluorine paint or a ceramic paint is coated for the purpose of improving corrosion resistance, non-sticking performance, various colors and the like.

However, in the conventional technique as described above, it is impossible to coat the engraved portion and the embossed portion with different colors, and when the coating layer is formed on the engraved portion and the embossed portion, the upper and lower coating layers are not bonded together A phenomenon is occurring.

That is, when the coating film is formed by the fluorine paint, the hardness of the fluorine coating film is low, so that in the process of removing the fluorine paint of the embossing portion, damage is easily caused at the interface between the embossing portion and the engraved portion and in the coating film at the engraved portion. Since the generated scratches indicate the loss of the fluorine coating film, even if the surface is wiped clean, there is a problem that black powder (fluorine component) continuously comes out. Particularly, since the controversy of harmfulness of the fluorine component is unremitting, there is a serious problem that when the coated fluorine component flows out, the health of the user is threatened and the damage of the fluorine coating film leads to a decrease in the non-adhesive performance.

In addition, ceramic coatings were not applicable due to the following problems. First, since the ceramic coating has a strong hardness due to its specific brittleness, it is easy to be broken by a large impact. Therefore, when the ceramic paint undercoat and the top coat are coated all at once on the engraved portion and the embossed portion and the embossed portion is removed, There is a problem that severe cracking occurs at the interface between the part and the embossed part and the merchantability is deteriorated.

Second, by removing the ceramic coating on the embossed portion, no coating is left on the embossed portion, which results in a problem that the non-adhesive performance is poor. This problem also occurs in the fluorine coating.

Third, the existing coating method of the ceramic coating has a problem that when the undercoat is cured, the undercoat is converted into a ceramic, and even when the topcoat is coated, the undercoat is not adhered to the undercoat. Therefore, The wet-on-wet method is used to remove the embossed portion. However, since the ceramic coating layer is completely cured, it is difficult to remove the coating layer of the embossed portion. In addition, since the ceramic coating layer is cracked at the interface between the embossed portion and the engraved portion due to the effect of brittleness And the like.

Patent Registration No. 10-0804387 (2008.02.11) Patent Registration No. 10-1476146 (Dec. 18, 2014) Registration Utility Model Registration No. 20-0470617 (December 24, 2013) Published Patent Publication No. 10-2017-0031364 (Feb.

An object of the present invention is to provide a ceramic coating method of a kitchenware which is formed such that a lower coating film and an upper coating film of a ceramic coating agent are formed on a kitchenware having a pattern of engraved portions and embossed portions on the surface thereof, And a kitchen utensil coated thereby.

The present invention relates to a method for manufacturing a kitchen utensil, comprising: a pretreatment step of pretreating a surface of a kitchen material having a pattern formed with a relief portion and a relief portion; A preheating step of removing foreign matter and preheating after the pretreatment step; A subcoating step of applying a ceramic coating agent having a color to the engraved portion and the embossed portion of the surface of the kitchen ware after the preheating step to form an undercoat film; After the undercoating step, the undercoat is dried to adjust the surface roughness to 0.2 to 5 mu m and the water contact angle to be 80 DEG or less; A step of removing the coating film coated on the embossed portion of the surface of the kitchen ware; An upper coating step of forming an upper coating film by applying a non-adhesive transparent ceramic coating agent to the embossed portion where the lower coating film is removed and the remaining lower coating film; After the top coating step and the drying step in which the top coating film is completely dried, the kitchenware having the engraved portions of the pattern and the embossed portions having different colors is manufactured.

The present invention has an effect that the colors of the engraved portion and the embossed portion are expressed differently by ceramically coating the lower and upper surfaces of the kitchen ware material in which the engraved portion and the embossed pattern of the embossed portion are formed. In particular, since the top coat of the present invention is made of a non-adhesive ceramic clear coating agent, the surface of the top coat is non-sticky.

Since the undercoat and the topcoat are not coated at the same time and the undercoat is dried, the present invention has no difficulty in removing the coating layer of the embossed portion, and the interface between the engraved portion and the embossed portion is also cleanly realized.

The present invention can be applied not only to kitchen utensils but also to building materials, and it can be provided with excellent appearance and physical properties such as durability, non-tackiness and corrosion resistance, It is effective.

1 is a block diagram illustrating a ceramic coating method according to the present invention.
FIG. 2 is a view showing an example of a configuration according to the present invention
Fig. 3 is a photograph showing an example of a SUS frying pan according to a second embodiment of the present invention
Fig. 4 is a view showing the photograph contrast according to the second embodiment of the present invention

FIG. 1 is a block diagram showing a ceramic coating method according to the present invention, FIG. 2 is an illustration showing a constitution according to the present invention, and FIG. 3 is a photograph showing a SUS frying pan according to a second embodiment of the present invention 4 is a photographic contrast view according to the second embodiment of the present invention,

A pretreatment step of pretreating a surface of a kitchen ware material (10) having a pattern formed of a relief part (11) and a relief part (12);

A preheating step of removing foreign matter and preheating after the pretreatment step;

A lower coating step of applying a ceramic coating agent having a color to the engraved portion 11 and the embossed portion 12 of the surface of the kitchenware after the preheating step to form an undercoating film 20;

After the subcoating step, the undercoating film 20 is dried to adjust the surface roughness to 0.2 to 5 m and the water contact angle to be 80 or less;

A coating film removing step of removing the undercoat film (20) coated on the embossed portion (12) of the surface of the kitchen ware;

An upper coating step of forming a top coat 30 by applying a non-adhesive transparent ceramic coating agent to the embossed portion 12 and the remaining undercoating film 20 from which the undercoated film is removed;

After the top coating step and the drying step in which the top coat 30 is completely dried, the kitchen ware 10 having the engraved portions 11 and the embossed portions 12 of different colors is manufactured .

In the pretreatment step, the surface of the kitchen ware material 10 on which the engraved portions and the embossed patterns are formed is pre-treated by sandblasting, etching, degreasing or the like. The negative / positive pattern of the kitchen article can be formed by various known methods such as etching, laser processing, lathe processing, magnetic particle processing, and the like. The kitchenware refers to various cooking utensils and containers used in kitchens such as frying pan, pot, wok, and the like.

The preheating step is performed not only to prevent the ceramic coating agent from flowing, but also to increase the hiding power when the undercoating is performed. It differs depending on the shape and the thickness of the material and the material, but preheating the kitchen material at about 30 ° C to 70 ° C desirable.

The undercoating step is a step of applying a ceramic coating agent to the surface of the kitchenware, wherein the ceramic coating agent is colored, has a low gloss, and has a coated surface hardness of 0.2 to 5 占 퐉.

For example, the ceramic coating agent may be a ceramic coating agent prepared on the basis of a sol-gel method for hydrolyzing an alkoxysilane, or a ceramic coating agent based on a sol-gel method for hydrolyzing the alkoxysilane, A hybrid ceramic coating agent may be used. The ceramic coating agent may be PC-3000 or SC-3000 which is a ceramic coating agent of Korea Fine Ceramics Co., Ltd., which is a representative of the present invention.

The drying step is a step of drying the applied ceramic coating agent to form an undercoat film in a dry state. The drying machine is not completely dried / cured, but is dried to a degree that fingerprints do not touch when hand- Fingering and drying).

That is, the drying step is performed so that the top coat 30 made of the non-adhesive ceramic clear coating agent for the undercoating film 20 made of a ceramic coating agent can be integrated without cracking, , Preferably 50 占 폚 to 80 占 폚, more preferably about 70 占 폚, for about 1 to 3 minutes, and more preferably for about 1 to 2 minutes. When the undercoating film is dried under such a drying condition, the undercoating film 20 having a water contact angle of 80 ° or less is formed while maintaining the surface roughness of 0.2 to 5 μm.

That is, in the drying step, when the undercoating film 20 is dried at a temperature exceeding 80 캜 for more than 3 minutes, the number of hydroxyl groups (-OH) on the surface of the coating film is decreased, If the water contact angle exceeds 80 °, the non-adhesive ceramic clear coating agent becomes dewy formed during the top coating, thereby failing to bond with the undercoating film.

Further, when the drying temperature is less than 50 ° or the drying time is less than 1 minute, it is not even dried / touched to dry, thereby causing contamination due to dust or foreign matter in the process of removing the coating film of the embossed portion, It is necessary to dry the undercoating layer within the drying temperature and the drying time as described above because damage occurs due to the step of removing the coating film.

By the above drying step, the undercoating film 20 has a water contact angle of 80 DEG or less and satisfies the surface roughness Ra of 0.2 to 5 mu m. When the surface roughness is adjusted to less than 0.2 mu m, the adhesive force between the undercoating film and the topcoating film is lowered, and when the surface roughness exceeds 5 mu m, the final coating film, that is, the surface of the topcoating film, The surface roughness should be maintained by the tug gun.

Further, it is preferable that the undercoat film 20 formed by the above-mentioned pressing process is formed to have a water contact angle of about 60 DEG or less and a surface roughness (Ra) of 1-3 mu m.

The step of removing the coating film is a step of removing the undercoating film 20 formed on the embossed portion 12 of the pattern so that the material of the kitchenware itself is exposed to the outside, and is formed by a known method such as sandpapering or grinding, The undercoating film formed on the surface is removed.

By such a step of removing the coating film, a pattern consisting of a relief portion where the material is exposed to the outside and a relief portion formed with the undercoating film is formed on the surface of the kitchenware.

The top coating step forms a top coat 30 by applying a non-adhesive ceramic clear coating to the patterned embossments and underlying coating. At this time, scratches generated upon removal of the undercoat layer are present in the relief portion 12, and the undercoat layer 20 has a surface roughness Ra of 0.2 to 5 占 퐉 and a water contact angle of 80 占 or less, The top coat film 30 produced by applying the adhesive ceramic clear coating agent has an increased surface adhesion strength to the raised portions 12 and the undercoat film 20. [ That is, the top coat 30 is integrally formed on the surface of the kitchen ware.

In addition, the top coat 30 is coated to a thickness of 2 to 15 탆, preferably about 5 to 10 탆, based on the dry film thickness. When the top coat 30 is less than 2 탆, the gloss and non- The risk of cracking is high and a coating layer coated on the embossed portion is peeled off by a spatula or a flap, so that a proper thickness should be provided.

Since the non-adhesive ceramic clear coating agent is a commercially available ceramic coating agent having a non-adhesive property, a detailed description thereof will be omitted.

Further, the non-adhesive ceramic clear coating agent may be further added with metallic particles or pigments such as pearl or paste.

The drying step may be performed by forming a fully cured top coat 30 by drying a kitchenware having a surface coated with a non-adhesive ceramic transparent coating agent at 150 to 300 캜, preferably about 200 to 250 캜 for 10 to 20 minutes do. At this time, if the drying is cured at less than 150 캜, the hardness of the top coat is lowered and the chemical resistance is weakened. When the temperature is higher than 300 캜, the impact resistance and non-tackiness of the top coat are lowered.

Hereinafter, the present invention will be described in detail with reference to the following examples.

Example 1

The SUS frying pan equipped with an embossed pattern was subjected to a sand blast treatment, preheated at a temperature of 40 DEG C based on the material temperature, coated with a ceramics coating agent for black (black) so as to have a dry thickness of 25 to 30 mu m, When the temperature of the material reached 80 ° C, it was held for 1 minute and then removed from the firing furnace to dry the undercoating film.

The surface roughness and the water contact angle of the undercoat layer thus dried were measured. As a result, the undercoat layer according to the present invention had a surface roughness (Ra) of about 1.5 to 1.8 μm and a contact angle of water of about 55 to 58 ° Respectively.

Example 2

The surface of the SUS frying pan according to Example 1 was rubbed with sandpaper # 800 to remove the ceramic coating (undercoat) on the embossed portion. Then, a non-adhesive ceramic clear coating was applied to the SUS frying pan from which the coating on the embossed portion had been removed, And cured at 200 캜, thereby completing the SUS fry pan coating having different colors of the obovate, as shown in Fig.

4 (a) is a microscope photograph (200 times) of the SUS frying pan of the present invention according to the second embodiment, and FIG. 4 (b) is a microphotograph (200 times) of a conventional frying pan As shown in FIG. 4, in the SUS frying pan according to the present invention, the boundary surface between the engraved portion and the relief portion is clearly expressed, whereas the conventional SUS frying pan has a phenomenon in which cracks are generated on the surface, Is generated. (The conventional SUS frying pan was provided with a fluorine coating film)

Example 3

The non-stick performance of the prepared SUS pans according to Example 2 was tested.

The prepared SUS frying pan according to Example 2 was washed with a neutral detergent and then heated at an inner surface temperature of 300 캜 for 30 minutes and cooled. Then, the frying pan was heated at 180 캜 to 190 캜 for 1 minute and 40 seconds in an egg fryer Washing with frying pan) was performed 10 times for 1 cycle, and the non-sticking performance according to the attachment of eggs was tested.

At this time, the non-sticking performance test was carried out with a score of 5, a score of 5 points when the entire egg fell from the SUS frying pan without any special force, 4 points when the egg fell without being attached with a slight force, 3 points when ripped, 2 points when the eggs were torn in two or more places, and 1 point when the eggs were difficult to peel off.

As a result, in the conventional SUS frying pan, the experiment was terminated in three cycles, but the SUS frying pan according to the present invention completed the experiment in seven cycles and five times. As a result, the SUS frying pan according to the present invention exhibited excellent non- It can be seen that the performance is provided.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

(10): Kitchen material material (11): engraved part
(12): Embossed portion (20): Lower film
(30): top coat (40): kitchen ware

Claims (5)

A pretreatment step of pretreating the surface of the kitchen ware material 10 having the pattern formed of the engraved portion 11 and the relief portion 12;
A preheating step of removing foreign matter and preheating after the pretreatment step;
A lower coating step of applying a ceramic coating agent having a color to the engraved portion 11 and the relief portion 12 of the surface of the kitchen ware after the preheating step to form an undercoat film 20;
After the subcoating step, the undercoating film 20 is dried to adjust the surface roughness to 0.2 to 5 m and the water contact angle to be 80 or less;
A coating film removing step of removing the undercoating film 20 coated on the embossed portion 12 of the surface of the kitchen ware;
An upper coating step of forming an upper coating film 30 by applying a non-adhesive ceramic clear coating agent to the embossed portion 12 and the remaining lower coating film 20 from which the lower coating film is removed;
It is possible to manufacture the kitchen ware 10 having the engraved portions 11 and the embossed portions 12 of different colors through the drying step of drying the top coat 30 completely after the top coating step Wherein the shape of the mandibles is clearly expressed on the surface of the kitchenware.
The method of claim 1,
Wherein the drying step is performed for 1 to 3 minutes at a material temperature of 100 DEG C or lower, so that the shape of the mandibular contour is clearly displayed on the surface of the kitchen utensil.
The method of claim 1,
Wherein the upper coating layer (30) has a dry coating thickness of 2 to 15 占 퐉.
The method of claim 1,
Wherein the non-adhesive ceramic clear coating agent is characterized in that metallic particles or pigment are further added to the surface of the kitchen ware.
A kitchen utensil characterized by being coated by the ceramic coating method according to any one of claims 1 to 4.

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